<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区 -->
    <el-card>
        <div id="main" style="width:1000px;height:600px;"></div>
    </el-card>
  </div>
</template>

<script>
//导入echarts
import * as echarts from 'echarts';
import _ from 'lodash'

export default {
    data() {
        return {
            options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
        }
    },
    created(){
        
    },
    //此时页面上的元素已经被渲染完毕了
    mounted(){
        this.Draw()
    },
    methods: {
        async Draw(){
            // 基于准备好的dom，初始化echarts实例
            var myChart = echarts.init(document.getElementById('main'));
            const {data:res}=await this.$http.get('reports/type/1')
            if(res.meta.status!==200){
                return this.$message.error('获取折线图数据失败！')
            }
            
            // 指定图表的配置项和数据
            // _.merge(res.data)
            Object.assign(this.options,res.data)

            // 使用刚指定的配置项和数据显示图表。
            myChart.setOption(this.options);
            },

    },
}
</script>

<style scoped>

</style>